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author | Christian Cleberg <hello@cleberg.net> | 2024-07-28 19:46:20 -0500 |
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committer | Christian Cleberg <hello@cleberg.net> | 2024-07-28 19:46:20 -0500 |
commit | 2be43cc479dfd4cfb621f14381330c708291e324 (patch) | |
tree | 7ac50f99425c5524c0820360754045b80d1bafcc /content/blog/2022-02-17-exiftool.org | |
parent | afe76ac7d7498b862abaa623790b91410e34574d (diff) | |
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diff --git a/content/blog/2022-02-17-exiftool.org b/content/blog/2022-02-17-exiftool.org new file mode 100644 index 0000000..cc2adef --- /dev/null +++ b/content/blog/2022-02-17-exiftool.org @@ -0,0 +1,59 @@ +#+date: <2022-02-17> +#+title: Stripping Image Metadata with Exiftool +#+description: + + +** Why Strip Metadata? + +Okay, so you want to strip metadata from your photos. Perhaps you take +pictures of very rare birds, and the location metadata is a gold mine +for poachers, or perhaps you're just privacy-oriented like me and prefer +to strip metadata from publicly-available images. + +There are various components of image metadata that you may want to +delete before releasing a photo to the public. Here's an incomplete list +of things I could easily see just by inspecting a photo on my laptop: + +- Location (Latitude & Longitude) +- Dimensions +- Device Make & Model +- Color Space +- Color Profile +- Focal Length +- Alpha Channel +- Red Eye +- Metering Mode +- F Number + +Regardless of your reasoning, I'm going to explain how I used the +=exiftool= package in Linux to automatically strip metadata from all +images in a directory (+ subdirectories). + +** Installing =exiftool= + +First things first: we need to install the tool. I'm running Debian 11 +on my server (Ubuntu will work the same), so the command is as simple +as: + +#+begin_src sh +sudo apt install exiftool +#+end_src + +There are different tools that can accomplish the same thing across +distributions, but I really only care to test out this one package. + +** Recursively Strip Data + +I actually use this tool extensively to strip any photos uploaded to the +website that serves all the images for my blog (=img.cleberg.net=). + +The following command is incredibly useful and can be modified to +include any image extensions that =exiftool= supports: + +#+begin_src sh +exiftool -r -all= -ext jpg -ext png /path/to/directory/ +#+end_src + +The output of the command will let you know how many directories were +scanned, how many images were updated, and how many images were +unchanged. |